She'll probably have her vocal chords altered...or have everything pre-recorded, and she'll have someone adjust her voice before we hear it.
That voice is AWFUL!!!
Play some excerpts of some of her speeches at her ranting, raving, screeching best, and for contrast one of her talks where she is speaking to a crowd of senior citizens as if she were talking to four year olds in her slow, syrupy sweet voice.
Then have a voiceover person ask, "Is this what you want to year for the next four years?"